Year	% gross
1981	100.103996276855
1986	102.987632751465
1989	108.415512084961
1990	108.170967102051
1991	108.04084777832
1992	106.76953125
1993	106.334167480469
1994	104.993827819824
1995	105.000602722168
1999	110.995010375977
2000	110.73558807373
2001	114.565017700195
2002	120.526237487793
2003	125.886077880859
2005	96.3050384521484
2006	96.3221588134766
2007	95.9389419555664
2008	95.2960891723633
2009	95.6448211669922
2011	96.3192901611328
2012	97.6717681884766
2013	97.3614883422852
2014	97.7486419677734
2015	99.9614410400391
2016	99.9712371826172
2017	101.963371276855
2018	103.911666870117
2019	103.676193237305
2020	104.651710510254
2021	103.507652282715
2022	101.705062866211